Rock crusher having contained rock screening and redirection means



June 5, 1951 F. n. FOGLE ROCK CRUSHER HAVING CONTAINED ROCK SCREENING AND REDIRECTION MEANS 2 Sheets-Sheet 1 Filed Nov. 14, 1947 INVENTOR. fiv/z Q fay/e June 1951 F D FOGLE 2,5 ,879

ROCK CRUSHER' HAVING CONTAINED ROCK SCREENING AND REDIRECTION MEANS Filed Nov. 14. 1947 2 Sheets-Sheet 2 52/7,? 0. Fag/e l BY ATTORNEY Patented June 5, 1951 ROCK CRUSHER HAVING CONTAINED ROCK SCREENING AND REDIRECTION MEANS Frank D. Fogle, Ottawa, Kans. Application November 14, 1947, Serial No. 785,878

3 Claims.

This invention relates to the field of construction and more particularly to crushing apparatus for rocks or the like commonly used in the field of building, road construction, building of dams and various other uses.

One of the most difficult problems presented to those engaged in the business of crushing rocks is that of a high percentage of slack and other powdered residue which is necessarily produced during rock crushing operations. Most rock crushers in use today during operation, produce as much as 40% to 50% slack or powder from the rock being crushed and broken into particles of desirable size and as well known by those experienced in this field, this difficulty causes handling of large amounts of rock that would otherwise not need to be handled if the amount of such residue could be diminished. This problem has become recently enhanced because of the fact that such residue is virtually a waste and has very few uses.

It is the most important object of this invention, therefore, to provide a rock crusher that will, through the inclusion of novel rock screening and redirection means, effectively break up large rocks into particles of predetermined and desired sizes and at the same time reduce the amount of slack and powdered particles to a minimum.

Another important object of this invention is to provide screening means in the form of a plurality of spaced bafiies arranged in underlying relationship to the aforesaid spaced apart beams to further segregate large particles of the rock and direct the same toward the hammer mills for further crushing.

Another object of this invention is to provide a rock crusher having screening means in the form of a pair of parallel beams interposed between each of the hammer mills and the rows of spaced apart beams to further prevent large and undesired particles of rock to fall through the opening formed at the bottom of the chamber.

Many minor objects will be made clear or become apparent during the course of the following specification, reference being had to the accompanying drawings, wherein:

Fig. 1 is a vertical substantially central cross sectional view of the rock crusher made in accordance with my present invention and taken on line 'I-I of Fig. 2.

Fig. 2 is a cross sectional view taken on line II-II of Fi 1.

Fig. 3 is an enlarged fragmentary detailed cross sectional view taken on line III--III of Fig. 2; and

These hoppers 20 are in opposed relationship and disposed near the top I8 of chamber In and an opening which places the hoppers 20 in communication with the interior of chamber I 0 is closed by a plurality of chains 22. These chains 22 are disposed across the entire Width of the aforesaid opening and constitute a plurality of rows progressively increasing in size as the interior of the chamber, I0 is approached. In other words, the row of chains next adjacent the interior of the chamber I0 is formed from indie vidual links having a greater size than the remainder of these chains 22, all as clearly illustrated in Fig. 1.

Chains '22 hang loosely within the opening leading into chamber I0 and are mounted at the uppermost ends thereof in any suitable manner to the top I8 of chamber II]. It is clear, therefore, that as the rock to be crushed is placed in the hoppers 23, this rock will fall by gravity into the interior of chamber II) by moving against and parting the chains 22. Furthermore, as hereinafter more fully described, the rock particles which are being crushed and thrown about within the interior of chamber II), will not project outwardly through the hoppers 20 because of the existence of chains 22.

The walls I2, I4 and I6 of chamber II) are made from any suitablestrong material and preferably in sections as shown, to the end that the same may be easily assembled and taken apart as desired. These sections of all of the walls I2, I4 and I6 are provided with flanges 24 turned outwardly and disposed in relative abutting relationship for fastening together through the medium of a plurality of bolts or the like 26.

An additional lining 21 may be provided as shown in Fig. 2 for the walls I4 and I6 of material that will not be easily damaged by the flying particles of rock within thhe chamber I0.

A pair of shafts 28 and 30 extend transversely across the chamber Ill between the walls I6 thereof in substantially parallel relationship. These shafts 28 and 30 are rotatably mounted within bearings 32 and 34 respectively and these bearings 32 and 34 are mounted exteriorly of the chamber I0 and attached to the sections forming the wall 12 of chamber ll]. Each of the hammer mills broadly designated by the numerals 36 and 38 have, in addition to the shafts 28 and 30 as a part thereof, a plurality of spaced apart disks 40. These disks 40 are rigidly secured to the respective shafts 28 and 30 and are provided with a number of spacers therebetween designated by the numeral 42. A number of hammers 44 are journaled for free swinging movement upon a shaft 46 extending through openings provided in the disks 40 disposed out-. wardly from the respective shafts 23 and 30 and the spacers 42, as clearly illustrated in Figs. 1 and 4. There are preferably three sets of these hammers 44, as shown in Fig. 2 on each of the hammer mills 36 and 38. However, it is realized that any number of these sets of swinging hammers 44 may be provided on each of the mills 36 and 38 if desired.

Sha ts .8 nd .0 a e. h. r e id d t a u able sheave 48 and 58 respectively mounted exerie ly of h chamber l nd hav n o ection with a suitable source of power (not shown), The outermost free ends of the hammers 44 of each of the mills 36 and 38 are slightly spaced apart as shown in Fig. 2, when the same are in rotative operation. The direction of rotation is as shown by arrows in Fig. 2, the direction of rotation of shafts 28 and 30 being opposite.

Rock directed into the, chamber 10 through the hoppers 28 falls by gravity upon these rotating hammer mills 36 and 38and crushing action takes place as the hammers 44 ofeach of the mills 36 and 38 come into contact therewith. The direction of rotation of the mills 36 and 38 in addition to causing crushing of .the rock, will cause the same to be projected upwardly toward the top [8 of the chamber l0. Such rock particles as come into contact with the top l8 of chamber ID will be further broken into smaller particles by a plurality of side-by-side T-shaped rails 52. These rails 52 are disposed in transverse relationship to the shafts 28 and 30 and extend entirely across'the chamber Ill between angled walls [4 thereof.

These rails 52 are secured in place in any suit: able manner and a number of posts 54 overlying the rails 52 serve to prevent upward displacement of the rails 52 when the rocks come into contact therewith These posts 54 are in spaced apart relationship as shown in Fig 2 and extend entirely across the chamber I ll between walls [6 thereof.

Posts 54 are preferably mounted by passing the same through openings within the walls l6 and securing the same in place by inserting transverse pins 56 therethrough exteriorly of these walls I6. Much of the material which is o e up ly by he m l 6. and 3.8. l. be directed at an angle and laterally toward the side walls 14 of chamber (q. segregation of the. smaller particles from the larger particles is ac.- h d. y 7 of beams 58. dispos d alon each of the inclined walls I 4 of chamber 10. These rows 8 a h c s i u e. plu l ty of beams 60 and a number of smaller beams 62-.

These beams 68 and 62 extend entirely across e id Wel 9 the cham e llan a e in Spaced p r leii sh M hhiihe Qf l of h e ms". nd. 2. is ee mpl eh d r er bly h a 1 211 1 5.. 5 5. 0121 .9 Q fdS a h. of he be ms. (i an 6. pass throu h pen:

We rrev ded' n. th e dwa ls l6. f hamber ehel a he aihstdis laee ent by trans-- length with the rowsv of beams 56* It is also notable, that much of the rock rolling from the-.1 top of the screens 68. and into the hammer mills.

' bottom of chamber 16.

4 verse pin passing therethrough exteriorly of the proximal end wall [6.

As shown in Fig. 2, the rows 58 of beams 6|] and 62 are passed from the innermost face of the walls l4 and extend from a point immediately below the rails 52 to a point approaching the mills 36 and 38. The distance between the rails 52 governs the size of crushed rock which will pass from the chamber I8, such particles of rock as will not pass through the openings between beams 66 falling back upon the hammers 44 of mills 35 and 38 for further crushing and projecting upwardly until the same will pass through such openings. After the crushed particles of rock pass through the openings between beam 60, the same will fall downwardly by gravity between the beams 66 and the proximal side wall [4 The precise inclination shown for the rows 58 of beams 60 and 62 will cause such rock particles to roll downwardly withoutreturning toward the center of the chamber l9. After these part1? cles reach the smaller beams 62, those particles of desired size will fall between rails 62 and downwardly through the open bottom of chamber H1. Other rock particles will continue to roll downwardly along the innermost face of the rows 58 and be deposited upon a screening assembly broadly designated by the numeral 64. There is a screening assembly. 64 underlying each of the rows 58 and the same are formed as detailed in Fig. 3 of the drawings.

A number of bafiie plates 66 are triangular in shape as shown in Fig. 2 and disposed in side.-

by-side relationship throughout the entire length of the beams 62 constituting'a part of the two inclined rows 58.. These plates 66 are wedge-1 shaped, the widths thereof progressively decreasing as the lowermost ends are approached. Thus, any rock particles that fall upon the uppermost face of the assembly 64 and fall between the. plates 66, will not become lodged therein since such spaces increase in width as the lowermost end of the. assembly 66 is approached.

The triangular shape of the baflles 66 forming the assembly 64, presents an inclined uppermostsurface and those particles of rock which will not pass between plates 66 will run downwardly and be picked up by the hammers 44 of the mills V 36 and 38 and either be crushed to a suitable size at the point of impact or be thrown upwardly. against the beams 62 or into the center of u n ctio in th chamber 9 Also disposed within the chamber [6 is screening means 68. This screen 68 constitutes a pair of spaced apart beams ll] interposed between the ou e m t th ave of th hamm rs nd. e r e bein the rows 58 of beams 56 and 62;. h an ep ed y. falling upon the. ro a in hamm rs 44 an fall n pon the upp rmo t fa e.

of the beams. 8 will. b d ec ed in he am e mill 3,6, and 36 f r r -crush ng. Thesebeam .6;

are mounted in substantially the same manner as are e m 6. 3 and 6.2. and re co e ive in 36 and 3.8 will be directed against the. lowermost surfaces of the beams 1:5, for further crushing.

It is clear from the foregoing that the crusher:

just described will accommodate rock of very large dimensions and that. such large. rocks. will be broken into fine particles of predetermined.

size, before the same can emanate from the open The rock particles; thus formed by the aforesaid crushing action will be.

of uniform size and all particles that have not been broken into the desired size will in one way or another be returned to the point of crushing action and re-handled until the desired size is attained. It is notable that the rock crushing effect is accomplished not only by the rapidly rotating hammers 44 but takes place when the material comes into contact with the various parts of the crusher. In other words, the projected particles are forcibly moved against the rows of beams 59 as well as against the rails 52 disposed along the uppermost wall of the chamber 19. Even after some of the rock passes through the rows 58 and rolls downwardly, this same rock is again handled by the mills 39 and 38 as above described.

The loosely hanging rows of chains 22 disposed across the openings of hopper 29 will prevent the flying rock within the chamber In from escaping therefrom.

Manifestly, many changes and modifications may be made in the rock crusher above described and herein illustrated without departing from the spirit of this invention or scope of the appended claims.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. In a rock crusher having structure including a top wall, a pair of spaced side walls and a pair of spaced end walls and forming an open bottom, hollow chamber provided with an inlet opening, there being a pair of spaced, rotatable rock crushing means in the chamber below the inlet opening adapted to project the rock upwardly and laterally to the top and both side walls of said structure, the improvement of which comprises a pair of opposed rows of elongated spaced-apart horizontal beams in the chamber within the path of travel of rocks projected by said means, said rows of beams being entirely above said means, converging as the uppermost ends thereof are approached and spaced from the walls of said structure; and screening apparatus underlying each row of beams respectively and including a plurality of spaced-apart, vertical plates mounted on each side wall respectively above the axes of rotation of said crushing means and having the uppermost edges thereof inclined downwardly and inwardly toward said axes of rotation beyond the proximal lowermost beam for directing A. a 1 toward said crushing means oversize rock ema nating from between the beams and corresponding side walls and rejected by said inclined edges of the plates.

2. In a rock crusher as set forth in claim 1 wherein the space between certain of the beams at the lowermost ends of each row thereof is less than the space between remaining beams.

3. In a rock crusher as set forth in claim 1 wherein the space between certain of the beams at the lowermost ends of each row thereof is less than the space between remaining beams,

and wherein is provided secondary, spaced-apart, horizontal beams between each row respectively and said crushing means, the secondary beams being above said certain beams.

FRANK D. F'OGLE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 266,857 McKenna Oct. 31, 1882 430,646 Hickey June 24, 1890 455,531 Good et a1 July 7, 1891 482,619 Carter Sept. 13, 1892 675,751 Moustier June 4, 1901 680,261 Lyman Aug. 13, 1901 853,481 Snow May 14, 1907 1,058,789 Pharo Apr 15, 1913 1,440,429 Williams Jan. 2, 1923 1,685,115 Adams Sept. 25, 1928 2,001,549 Sandy May 14, 1935 2,233,727 Bell Mar. 4, 1941 2,373,691 Kessler Apr. 17, 1945 2,411,302 Stine Nov. 19, 1946 2,468,321 Bland Apr. 26, 1949 2,486,421 Kessler Nov. 1, 1949 FOREIGN PATENTS Number Country Date 730,261 France May 9, 1932 OTHER REFERENCES Bulletin No, 651 of New Holland Machine Company, New Holland, Pa., U. S. A., Printed November 11, 1944, entitled New Holland Double Imgeller Stone Crusher, 8 pages. Printed copy in 

